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Python语言及其应用(第2版)
book

Python语言及其应用(第2版)

by Bill Lubanovic
March 2022
Intermediate to advanced
522 pages
13h 52m
Chinese
Posts & Telecom Press
Content preview from Python语言及其应用(第2版)
字符串
53
>>> str(True)
'True'
当你对非字符串对象调用
print()
以及
格式化字符串
时,
Python
会在内部使用
str()
函数,
本章后面会介绍。
5.3
使用
\
转义
Python
允许对字符串中的某些字符进行
转义
,实现本来难以表达的效果。通过在字符前面
加上反斜线(
\
),可以为其赋予特殊含义。最常见的转义序列是
\n
,表示开始新行。你可
以借此在单行字符串中创建多行文本:
>>> palindrome = 'A man,\nA plan,\nA canal:\nPanama.'
>>> print(palindrome)
A man,
A plan,
A canal:
Panama.
转义序列
\t
tab
)可用于对齐文本:
>>> print('\tabc')
abc
>>> print('a\tbc')
a bc
>>> print('ab\tc')
ab c
>>> print('abc\t')
abc
(最后一个字符串在行尾有一个你看不到的制表符。)
可能还需要在以相同字符引用的字符串内使用
\'
\"
指定字面单引号或双引号:
1
>>> testimony = "\"I did nothing!\" he said. \"Or that other thing.\""
>>> testimony
'"I did nothing!" he said. "Or that other thing."'
>>> print(testimony)
"I did nothing!" ...
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Publisher Resources

ISBN: 9787115586223